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Original Reduced Ion Chamber and GM Counts


Availability: Archived at NSSDC, accessible from elsewhere

Time span: 1967-07-19 to 1967-11-15


This data set consists of ion chamber observations and accumulated count data from two Geiger-Muller (GM) tubes in a time-ordered format submitted by the experimenter on BCD magnetic tapes written by an IBM 360/40 computer. Each tape was generated by stacking seven short GSFC data tapes. The first file on each stacked tape is a one-record file that serves as an index to that short tape. Each physical record is 865 characters long and can contain 72 12-character logical records. The index file precedes the stacked experiment data, in which each physical record contains four data sequences. A sequence contains the time (UT) of the observation, two accumulations each from GM tubes A and B and the ion chamber, sun angle, satellite spin period, sun time, moon time, and a number of processing error flags.

Data are available online at

Alternate Names

  • Orig GM & Ion Chamber Counts


  • Space Physics: Magnetospheric Studies
  • Space Physics: Heliospheric Studies


  • 67-070A-02A

Additional Information



Questions and comments about this data collection can be directed to: Coordinated Request and User Support Office



NameRoleOriginal AffiliationE-mail
Mr. Robert M. CandeyGeneral ContactNASA Goddard Space Flight

Selected References

  • Anderson, K. A., Final report for energetic particle flux experiment (AIMP-D and E) (28 January 1965 to 31 October 1969), U. of Calif., Space Sci. Lab., Series 11, Issue 75, Berkeley, CA, Undated.
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